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Parallel Comparison of the 1982/83,1997/98 and 2015/16 Super el Nios and Their effects on the extratropical Stratosphere

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Advances in Atmospheric Sciences 2017年第9期34卷 1121-1133页

作者： Jian rao Rongcai ReN Key Laboratory of Meteorological Disaster Ministry of Education (KLME)/Joint International Research Laboratory of Climate and Environment Change (ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CIC-FEMD)Nanjing University of Information Science and Technology State Key Laboratory of Numerical Modeling for Atmospheric Sciences and Geophysical Fluid Dynamics Institute of Atmospheric PhysicsChinese Academy of Sciences

This study uses multiple sea surface temperature （SST） datasets to perform a parallel comparison of three super el Nifios and their effects on the stratosphere. The results show that, different from ordinary el Nifios, warm SST anomalies appear earliest in the western tropical Pacific and precede the super el Nifio peak by more than 18 months. In the previous winter, relative to the mature phase of el Nifio, as a precursor, North Pacific Oscillation-like circulation anomalies are observed. A Pacific-North America （PNA） teleconnection appears in the extratropical troposphere during the mature phase, in spite of the subtle differences between the intensities, as well as the zonal position, of the PNA lobes. Related to the negative rainfall response over the tropical Indian Ocean, the PNA teleconnection in the winter of 1997/98 is the strongest among the three super el Nifios. The northern winter stratosphere shows large anomalies in the polar cap temperature and the circumpolar westerly, if the interferences from other factors are linearly filtered from the circulation data. Associated with the positive PNA response in a super el Nino winter, positive polar cap temperature anomalies and circumpolar easterly anomalies, though different in timing, are also observed in the mature winters of the three super el Nifios. The stratospheric polar vortex in the next winter relative to the 1982/83 and 1997/98 events is also anomalously weaker and warmer, and the stratospheric circulation conditions remain to be seen in the coming winter following the mature phase of the 2015/16 event.

关键词： super el Nifio Pacific-North America (PNA) teleconnection stratosphere proceeding winter

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exact Boundary Controllability for a Coupled System of Wave equations with Neumann Boundary Controls(Dedicated to Professor Haim Brezis on the occasion of his 70th birthday)

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Chinese Annals of Mathematics,Series B 2017年第2期38卷 473-488页

作者： Tatsien LI Bopeng rao school of mathematical sciences fudan universityShanghai 200433China/shanghai key laboratory for contemporary applied mathematics/nonlinear mathematical modeling and methods laboratory institut de recherche mathmatique avancée universite de strasbourgFrance

This paper first shows the exact boundary controllability for a coupled system of wave equations with Neumann boundary controls. In order to establish the corresponding observability inequality, the authors introduce a compact perturbation method which does not depend on the Riesz basis property, but depends only on the continuity of projection with respect to a weaker norm, which is obviously true in many cases of application. Next,in the case of fewer Neumann boundary controls, the non-exact boundary controllability for the initial data with the same level of energy is shown.

关键词： Compactness-uniqueness perturbation, Boundary observability, exactboundary controllability, Non-exact boundary controllability, Coupledsystem of wave equations, Neumann boundary condition

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enhanced Hybrid equilibrium Strategy in Fog-Cloud Computing Networks with Optimal Task Scheduling

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Computers, Materials & Continua 2024年第5期79卷 2647-2672页

作者： Muchang rao Hang Qin School of Computer Science Yangtze UniversityJingzhou434000China

More devices in the Intelligent Internet of Things(AIoT)result in an increased number of tasks that require low latency and real-time responsiveness,leading to an increased demand for computational *** computing’s low-latency performance issues in AIoT scenarios have led researchers to explore fog computing as a complementary ***,the effective allocation of resources for task execution within fog environments,characterized by limitations and heterogeneity in computational resources,remains a formidable *** tackle this challenge,in this study,we integrate fog computing and cloud *** begin by establishing a fog-cloud environment framework,followed by the formulation of a mathematical model for task ***,we introduce an enhanced hybrid equilibrium Optimizer(eHeO)tailored for AIoT task *** overarching objective is to decrease both the makespan and energy consumption of the fog-cloud system while accounting for task *** proposed eHeO method undergoes a thorough evaluation against multiple benchmark algorithms,encompassing metrics likemakespan,total energy consumption,success rate,and average waiting *** experimental results unequivocally demonstrate the superior performance of eHeO across all assessed ***,in the most favorable conditions,eHeO significantly diminishes both the makespan and energy consumption by approximately 50%and 35.5%,respectively,compared to the secondbest performing approach,which affirms its efficacy in advancing the efficiency of AIoT task scheduling within fog-cloud networks.

关键词： Artificial intelligence of things fog computing task scheduling equilibrium optimizer differential evaluation algorithm local search

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Implications for the lithospheric structure of Cambay rift zone,western India:Inferences from a magnetotelluric study

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Geoscience Frontiers 2020年第5期11卷 1743-1754页

作者： Nagarjuna Danda C.K.rao Amit Kumar P.Rama rao P.B.V.Subba rao Dr.K.S.Krishnan Geomagnetic Research Laboratory IIGAllahabad221505India Indian Institute of Geomagnetism New PanvelNavi Mumbai410218India Department of Geophysics Andhra UniversityVisakhapatnam530003India

Broad-band and long-period magnetotelluric(MT)data were acquired along an east-west trending traverse of nearly 200 km across the Kachchh,Cambay rift basins,and Aravalli-Delhi fold belt(ADFB),western *** regional strike analysis of MT data indicated an approximate N59°e geoelectric strike direction under the traverse and it is in fair agreement with the predominant geological strike in the study *** decomposed transverse electric(Te)-and transverse magnetic(TM)-data modes were inverted using a nonlinear conjugate gradient algorithm to image the electrical lithospheric structure across the Cambay rift basin and its surrounding *** studies show a thick(~1-5 km)layer of conductive Tertiary-Mesozoic sediments beneath the Kachchh and Cambay rift *** resistive blocks indicate presence of basic/ultrabasic volcanic intrusives,depleted mantle lithosphere,and different Precambrian structural *** crustal conductor delineated within the ADFB indicates the presence of fluids within the fault zones,sulfide mineralization within polyphase metamorphic rocks,and/or Aravalli-Delhi sediments/*** observed conductive anomalies beneath the Cambay rift basin indicate the presence of basaltic underplating,volatile(CO2,H2 O)enriched melts and channelization of melt fractions/fluids into crustal depths that occurred due to plume-lithosphere *** variations in electrical resistivity observed across the profile indicate that the impact of Reunion plume on lithospheric structures of the Cambay rift basin is more dominant at western continental margin of India(WCMI)and thus support the hypothesis proposed by Campbell&Griffiths about the plume-lithosphere interactions.

关键词： Cambay rift Deccan basalts Magnetotellurics Partial melt Reunion plume

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effectiveness of sodium silicate as gangue depressants in iron ore slimes flotation

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International Journal of Minerals,Metallurgy and Materials 2011年第5期18卷 515-522页

作者： Danda Srinivas rao Tadiparthi Venkata VijayaKumar Sripada Subba rao Swarna Prabhakar Guntamadugu Bhaskar Raju National Metallurgical Laboratory-Madras Centre Council of Scientific and Industrial Research-Madras ComplexChennai 600 113India

The recovery of iron from the screw classifier overflow slimes by direct flotation was studied. The relative effectiveness of sodium silicates with different silica-to-soda mole ratios as depressants for silica and silicate bearing minerals was investigated. Silica-to-soda mole ratio and silicate dosage were found to have significant effect on the separation efficiency. The results show that an increase of Fe content in the concentrate is observed with concomitant reduction in SiO2 and A1203 levels when a particular type of sodium silicate at a proper dosage is used. The concentrate of 58.89wt% Fe, 4.68wt% SiO2, and 5.28wt% A1203 with the weight recovery of 38.74% and the metal recovery of 41.13% can be obtained from the iron ore slimes with 54.44wt% Fe, 6.72wt% SiO2, and 6.80wt% A1203, when NazSiO3 with a silica-to-soda mole ratio of 2.19 is used as a depressant at a feed rate of 0.2 kg/t.

关键词： iron ores sodium silicate depressants flotation

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An ecofriendly approach for corrosion control of 6061 Al-15%(v)SiC(P)composite and its base alloy

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Chinese Journal of Chemical engineering 2017年第3期25卷 363-372页

作者： Charitha B.P. Padmalatha rao Department of chemistry Manipal Institute of TechnologyManipalUdupiKamatakaIndia

Corrosion inhibition characteristics of bio polymer dextran was studied for the corrosion control of 6061 Al-15%_((v)) SiC_((P)) composite and its base alloy in 1 mol·L^(-1) HCl. Standard electrochemical techniques such as potentiodynamic polarization(PDP) measurements and electrochemical impedance spectroscopy(eIS) method were adopted for corrosion rate measurement. Surface morphology was studied by scanning electron microscopy(SeM) and elemental mapping was done by energy dispersive X-ray(eDX) analysis. Suitable mechanism was proposed for corrosion and inhibition process. Results indicated that dextran acts as an excellent anticorrosive agent for the corrosion control of 6061 Al-15%_((v)) SiC_((P)) composite, with maximum inhibition efficiency of 91% for the concentration of 0.4 g·L^(-1) at 303 K. Dextran acted as a mixed type of inhibitor, and got physically adsorbed both on composite and base alloy by obeying Langmuir adsorption isotherm. Dextran is proved to be a green inhibitor with environmental and economic benefits.

关键词： 6061 Al-15%(v) SiC(p) composite Green inhibitor Biopolymer electrochemical studies SeM–eDX

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Leptosririllumferrooxidans-sulfide mineral interactions with reference to bioflotation nad bioflocculation

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中国有色金属学会会刊：英文版 2008年第6期18卷 1403-1409页

作者： A. VILINSKA K. HANUMANTHA rao Division of Mineral Processing Lulea University of Technology SE-971 87 LULEA Sweden

铁的离子的粘附黄铁矿和黄铜矿矿物质上的成年 Leptospirillum ferrooxidans 房间通过吸附，希腊语的第六个字母潜力和弥漫的反射英尺红外被调查大小。当絮凝行为被 Turbiscan 大小检验时，矿物质 floatability 上的细菌的种类的影响被 ... 详细信息

铁的离子的粘附黄铁矿和黄铜矿矿物质上的成年 Leptospirillum ferrooxidans 房间通过吸附，希腊语的第六个字母潜力和弥漫的反射英尺红外被调查大小。当絮凝行为被 Turbiscan 大小检验时，矿物质 floatability 上的细菌的种类的影响被 Hallimond 筹款测试决定。矿物质等电位的点(pH 6.5 ? 7.5 ) 在和细菌的房间的相互作用向房间转移了等电位的点以后(pH 3.3 ) ，在矿物质上显示房间吸附的化学性质出现。与细菌的房间对待的矿物质的英尺红外系列显示出所有房间的存在功能的组意味着房间吸附。黄铜矿上的细菌的房间吸附与黄铁矿相比是更高的，它同意了房间与黄铁矿比较的黄铜矿筹款和显著絮凝行为上的更大的萧条效果。

关键词：细菌硫矿絮凝浮选

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Numerical study on solid–liquid phase change in paraffin as phase change material for battery thermal management

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Science Bulletin 2016年第5期61卷 391-400页

作者： Qiannan Zhang Yutao Huo Zhonghao rao School of electric Power engineering China University of Mining and Technology Key Laboratory of energy Thermal Conversion and Control of Ministry of education Southeast University

With the large latent heat and low cost, the paraffin has been widely used in battery thermal management(BTM) system to improve the efficiency and cycling life of power battery. The numerical model of paraffin melting in a cavity has been established, and the effects on the solid–liquid phase change process have been investigated for the purpose of enhancing the heat transfer performance of paraffin-based BTM system. The results showed that the location of the heating wall had great effects on the melting process. The paraffin in the cavity melted most quickly when the heating wall located at the bottom. Furthermore, the effects of thermal conductivity and the velocity of the slip wall have been considered. The gradient of liquid fraction increased with the increase in thermal conductivity, and the melting process could be accelerated or delayed by the slip wall with different velocity.

关键词： Phase change material Battery thermal management Solid–liquid phase change Heat flux Thermal conductivity

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Learning Bayesian networks using genetic algorithm

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Journal of Systems engineering and electronics 2007年第1期18卷 142-147页

作者： Chen Fei Wang Xiufeng rao Yimei Coll. of Information Technical Science Nankal Univ. Tianjin 300071 P. R. China

A new method to evaluate the fitness of the Bayesian networks according to the observed data is provided. The main advantage of this criterion is that it is suitable for both the complete and incomplete cases while the others not. Moreover it facilitates the computation greatly. In order to reduce the search space, the notation of equivalent class proposed by David Chickering is adopted. Instead of using the method directly, the novel criterion, variable ordering, and equivalent class are combined,moreover the proposed mthod avoids some problems caused by the previous one. Later, the genetic algorithm which allows global convergence, lack in the most of the methods searching for Bayesian network is applied to search for a good model in thisspace. To speed up the convergence, the genetic algorithm is combined with the greedy algorithm. Finally, the simulation shows the validity of the proposed approach.

关键词： Bayesian networks Genetic algorithm Structure learning equivalent class

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One step synthesis and characterization of copper doped sulfated titania and its enhanced photocatalytic activity in visible light by degradation of methyl orange

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Chinese Journal of Chemical engineering 2016年第4期24卷 475-483页

作者： Radha Devi Chekuri Siva rao Tirukkovalluri Department of Inorganic and Analytical Chemistry School of Chemistry Andhra University Visakhapatnam India

This paper reports on the synthesis of copper doped sulfated titania nano-crystalline powders with varying （2.0%-10.0%, by mass） by single step sol gel method. The synthesized photo catalyst has been characterized by employing various techniques like X-ray Diffraction （XRD）, Ultraviolet-Visible Diffuse Reflection Spectroscopy （UV-Vis DRS）, X-ray Photoelectron Spectroscopy （XPS）, Scanning electron Microscopy （SeM）, energy Dispersive Spectrometry （eDS）, Fourier Transform Infrared Spectroscopic Studies （FT-IR）, and Transmission electron Microscopy （TeM）. From the XRD and TeM results, all the samples were reported in anatase phase with reduction in particle size in the range of 7 to 12 nm. SeM indicated the change in morphology of the particles. The presence of copper in titania lattice was evidenced by XPS. From UV-Vis DRS and FT-IR studies indicated that prominent absorption shift is observed towards visible region （red shift）, the entry ofCu2 ＋ into Ti02 lattice as a substitution- al dopant and S042- ions were covalently bonded with Ti4＋ on the surface of the copper doped titania respectively. The photocatalytic activity studies were investigated by considering methyl orange （MO） as dye pollutant in the presence of the visible light. The effect of various parameters like effect of dosage of the catalyst, dopant concentration, pH of the solution, and concentration of the dye was studied in detail.

关键词： Copper doped sulfated TiO2 Sol-gel methodPhotocatalysisMethyl orange

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